Vulnerability Report

CVE-2023-43770

CISA KEV Active

Title: Roundcube Webmail Cross-Site Scripting (XSS)

Cross-Site Scripting (XSS)

Proof Of Concept

No public PoC currently indexed for CVE-2023-43770.

CWE Category CWE-79
Published Date Sep 22, 2023
Modified Date Oct 31, 2025
Exploit Status Not Found
Score 6.1 CVSS v3.1
Exploit Probability (EPSS)
58.48%

Vulnerability Summary

CVE-2023-43770: Roundcube before 1.4.14, 1.5.x before 1.5.4, and 1.6.x before 1.6.3 allows XSS via text/plain e-mail messages with crafted links because of program/lib/Roundcube/rcube_string_replacer.php behavior.

Impacted Vendors

C
cobalt 1
R
roundcube 1
V
vdesk 1

Reference Links

https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html https://roundcube.net/news/2023/09/15/security-update-1.6.3-released https://github.com/roundcube/roundcubemail/commit/e92ec206a886461245e1672d8530cc93c618a49b https://lists.debian.org/debian-lts-announce/2023/09/msg00024.html https://roundcube.net/news/2023/09/15/security-update-1.6.3-released https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43770
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
6.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity MEDIUM
6.1
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
REQUIRED
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-43770 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction REQUIRED
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected Stack

No specific products linked.